Answers to the most common questions UK motorists ask about mobile speed cameras - including how to identify a camera van, how laser guns work, what an operator can and cannot do, whether windows need to be open, and what to do if you receive a Notice of Intended Prosecution without being stopped.
SpeedCamerasUK.com does not operate any UK speed cameras and has no connection to UK Government, the Police, or any Safety Camera Partnership. We are unable to advise on individual speeding cases or the progress of a speeding offence. If you have a question not answered below, please use our contact form.
Van identification and signage
Does a mobile speed camera van need to be sign-written or have camera stickers on it?
No. Mobile speed camera vans are not required by law to be sign-written or carry camera markings. They can and do operate from unmarked vehicles, including cars, vans, and motorcycles. The key legal requirement is that speed camera warning signs must be displayed on approach to any road where speed cameras are operating, whether fixed or mobile. If you see a speed camera warning sign, you should expect cameras to be active in that area.
Does a mobile speed camera van have to be visible from 60 metres away?
The 60 metre visibility guideline has historically been associated with speed camera deployment, but it applies to fixed cameras in certain contexts rather than being a universal legal requirement for all mobile operations. The key requirement is that appropriate road signage is in place. If you believe a camera was operating without the required signage and you have received a NIP, the issuing Police force is the correct point of contact - we cannot provide legal advice.
Do Police forces publish details of where mobile cameras will be operating?
Some Police forces and Safety Camera Partnerships do publish scheduled mobile camera locations on their websites; others do not. There is no legal requirement to do so. Checking your local force's website is the most reliable way to find out whether this information is available in your area.
Are mobile speed camera vans operated by Police officers or civilians?
It varies between Police forces and Safety Camera Partnerships. Some mobile camera operations are staffed by trained Police officers, others by civilian operators employed by the Safety Camera Partnership. Contact your local Police force for a definitive answer.
Laser and radar technology
How far away can a mobile speed camera operate?
It depends on the device. Radar-based mobile cameras typically operate at a range of 200 to 300 yards. Laser-based devices, which are far more widely used by Police and Safety Camera Partnerships in the UK, can operate at ranges of up to one mile on a straight section of road. They cannot record around bends or over the brow of hills.
Can a mobile camera target only one vehicle at a time?
Yes. A single laser gun can only target one vehicle at a time. However, laser guns take between one and three seconds to produce an accurate speed reading, so a skilled operator can target a large number of vehicles in a short period. A single mobile speed camera location may also have more than one operator and more than one device.
Can a mobile speed camera catch me from the side, or must it see the front or rear of my vehicle?
To record your vehicle's speed and obtain a prosecutable reading, the operator must be able to target the front or rear of your vehicle - not just the side. Your number plate must also be captured to issue a NIP. If only the side of your vehicle was visible to the operator, they would not be able to obtain a valid speed reading or identify your vehicle.
Does a mobile camera van need to have its windows open to operate?
No. Mobile speed camera equipment can operate through closed windows. This is a common myth. We have received confirmed reports from motorists who were successfully prosecuted by a van with its windows closed.
Can a mobile speed camera van catch me from a bridge or elevated position?
Yes. Mobile speed cameras can and do operate from elevated positions including motorway bridges, footbridges, and overpass structures. They can target vehicles on both carriageways from such positions.
What the operator can do
Can a mobile camera catch me if I am driving towards it on the opposite side of the road?
Yes. Mobile speed cameras can target vehicles travelling towards them, away from them, and on the opposite side of the road. A van parked on the opposite carriageway may still be targeting vehicles on your side.
Can a mobile camera van operate while moving?
In the UK, mobile speed cameras are typically deployed from a stationary position. However, it is technically possible to record speed from a moving vehicle, and some Police forces do use in-car CCTV and following-distance checks from moving patrol vehicles. In North America, mobile radar from moving vehicles is common; in the UK this is not the standard approach.
If I was driving behind another car when I passed a mobile camera, can they still catch me?
Yes. A laser beam can be as small as 10cm in diameter when it reaches your vehicle. As long as the operator could see and target your vehicle - even briefly through a gap in traffic - a valid speed reading can be obtained.
Can a mobile camera operate across multiple speed limits on the same road?
Yes. The operator is aware of the speed limit at their location and can target vehicles at the specific speed limit applicable to that point on the road. On a road with multiple speed limit zones, an operator could target vehicles at each limit in quick succession.
NIPs and prosecution
Do Police need to stop me at the time to issue a speeding ticket?
No. If the Police or Safety Camera team have sufficient evidence of the offence - typically photographic or video footage with your number plate clearly visible - they do not need to stop you at the roadside. A Notice of Intended Prosecution can be sent to the registered keeper of the vehicle after the event. If you are caught by a mobile camera, you should expect the NIP to arrive within 14 days of the offence.
What speed threshold will trigger a NIP from a mobile camera?
The prosecution threshold varies between Police forces. ACPO guidelines suggest speed limit plus 10% plus 2mph, but some forces prosecute at a lower margin. The specific threshold for any individual force or Safety Camera Partnership is only known by that authority. Do not assume any margin above the posted limit is safe.
Speed camera detectors
Will a speed camera detector warn me of a mobile speed camera van?
A GPS-based speed camera detector can alert you to known mobile speed camera sites that are recorded in its database. However, mobile cameras can operate at any location, so GPS alerts alone are not comprehensive. Devices that also include a laser and radar detector can alert you when a live laser or radar gun is active nearby, though this warning may come very late if you are the first vehicle to be targeted. For more information see our speed camera detector buying guide.
Got a mobile speed camera question not answered above? Use our contact form to send it to us. Please note we cannot provide legal advice or comment on individual speeding cases.
For full technical details on how mobile speed cameras work, visit our mobile speed camera guide. For questions about other camera types, see the Speed Camera FAQs page.
Disclaimer: Answers published on SpeedCamerasUK.com represent the views of the site and its contributors. SpeedCamerasUK.com is not connected to any UK Police force, local authority, or Safety Camera Partnership.
Answers to the most common questions UK motorists ask about mobile speed cameras - including how to identify a camera van, how laser guns work, what an operator can and cannot do, whether windows need to be open, and what to do if you receive a Notice of Intended Prosecution without being stopped.